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Most Common Obfuscation Techniques In Fake AV Pages

ID: 1068d107-7a88-522e-a3a0-bcd5aef8fa6b

STIX ID: report--1068d107-7a88-522e-a3a0-bcd5aef8fa6b

Feed Name: Zscaler Security Research Blog

Threat Score
50/100

Date Published: 2025-04-02

Date Updated: 2026-05-01

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This blog post analyzes Fake AV malicious webpages and their evasion/obfuscation techniques — including HTML entity encoding of content and attributes, random whitespace insertion, hex-encoded inline CSS and JavaScript, and light JavaScript obfuscation — used to frustrate IDS/antivirus signature detection; the author reports over 100 variants and highlights that attackers focus on detection evasion rather than concealing code.

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